[libvirt] PATCH: 0 of 5: Remove all linked lists

I've been doing some proof of concept work to make the libvirtd daemon multi-threaded, and this in turns mean that the QEMU / LXC / OpenVZ drivers need to have some degree of locking on their internal data structures. Unforatunately the internal domain/network/storage APIs make extensive use of linked lists for tracking objects. This makes it incredibly hard to do fine grained locking of individual objects - eg, deleting one object requires locking the object it points to, and one the pointing to it in the linked list, as well as the list itself. This would be so complex we'd inevitably introduce locking bugs. So the series of patches which follow replace all linked lists with explicitly sized arrays. This means I only need 2 levels of locks, one on the driver object, and one of the domain/network/storage object being manipulated. The semantics for this are nice & easy to define. Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|